From my experience, the EMAXX EMX-MCP61S-AVL Mother Board is a very stable and reliable motherboard. I sometimes leave it on for days. It has a built-in nVIDIA MCP61S Chipset and Integrated GF 6100 VGA for video and 3D, supports 2x DDR II 800/667/533 DIMM, Supports M2 Socket 940 CPU, an 8 channel HD Audio Sound, with M2 Dual channel/FSB 1G/800 support as well.
This motherboard is easy to build and is very affordable. The advantage of Emaxx is that it already features Nvidia GeForce and Nvidia Nforce4 media and communication processors. It allows for flexible platforms for buildingyour PCs.
With the built-in GeForce 6, you don't have to spend additional to get crisp video and game qualities. This is good if you're planning on building a gaming PC, without spending too much but still getting high quality performance.
It's ActiveArmor firewall allows for secure networking. MediaShield allows for secure storage.
Overall, I recommend buying this motherboard.